Reply To: What Instruments used to measure Girdle thickness & [W] Width of Stone? › Forums › Tools and Other Hardware › What Instruments used to measure Girdle thickness & [W] Width of Stone? › Reply To: What Instruments used to measure Girdle thickness & [W] Width of Stone? April 28, 2016 at 5:23 pm #2571 erniehawesParticipant @erniehawes I’ve read that competition cutters some years ago used the back edge of a broken hack saw blade as a reference to determine girdle thickness.